Fieldworks :Species Distribution
Module
Download
evaluation version
-kite diagrams, bar
charts, centralised bar charts
-diversity
indices
-similarity
indices
-correlations
-species
information and habitat information: : rocky shore, sand dune,
salt marsh, moorland
Typical kite diagram showing species distribution across a salt marsh:
Example of species information from sand dune system:
Marram Grass (Ammophila arenaria)
Life
history
Distribution
Limiting
factors
Adaptations
perennial
yellow dunes
|
water availability due to limited organic matter in the sand and hence limited water holding capacity and rapid infiltration rate |
-minimises evapotranspiration by:thick cuticle, stomata in pits within grooves, rolling of leaf maximises water uptake by :large, spreading root system, underground rhizomes |
|
salinity |
- can only colonise areas where salinity has been reduced by rainfall |
|
nutrient availability |
-nitrogen fixing bacteria and mycorrhiza associated with roots(Ranwell, 1972) |
|
wind |
-deep roots provide anchorage; rolled leaf minimises drag |
|
windblown sand |
-burial stimulates growth of new buds |
|
temperature |
- production of stress metabolites (eg proline) increases the heat stability of enzymes (Crawford, 1989) |
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